DataTables read ajax response with your own parameters

Question

Using DataTables 1.10.15 in Server Side mode. I've created a PHP script to provide a JSON response which includes the parameters they mention in the documentation: https://datatables.net/manual/server-side#Returned-data

I want to add my own parameters to the JSON response, e.g.

$response = [
    'data' => [ ], // Required by DataTables 
    'form_errors' => [ ] // Not required by DataTables
];
echo json_encode($response);

The js which I have for the ajax call looks like this:

var myTable = $('#myTable').DataTable( {
    "serverSide": true,
    "ajax": { 
        "url" : "/response.php",
        "method" : "POST"
    },
});

How can I read the ajax response? I've seen in the API that there is a .on('xhr') method (https://datatables.net/reference/event/xhr) which fires when the ajax request has been completed, e.g.

var myTable = $('#myTable').DataTable( {
    "serverSide": true,
    "ajax": { 
        "url" : "/response.php",
        "method" : "POST"
    },
}).on( 'xhr.dt', function () {
    // Read response here?
});

But I cannot find a way to read the ajax response data at that point.

Does anyone know if this is possible?

Answer 1

Old question, but i'll try to answer may need for future, because i have exactly same problem and after looking for their documentation i found drawCallback.

From your code:

var myTable = $('#myTable').DataTable( {
    "serverSide": true,
    "ajax": { 
        "url" : "/response.php",
        "method" : "POST"
    },
    "drawCallback": function (settings) { 
        // Here the response
        var response = settings.json;
        console.log(response);
    },
});